diff --git a/src/Make.php b/src/Make.php
index cdcbaf0f..b3b41d05 100755
--- a/src/Make.php
+++ b/src/Make.php
@@ -1857,8 +1857,17 @@ public function tagprod(stdClass $std): DOMElement
                 $this->errors[] = "cEANTrib {$ceantrib} " . $e->getMessage();
             }
         }
-        $CRT = $this->emit->getElementsByTagName("CRT")->item(0)->nodeValue ?? null;
-        $idDest = $this->ide->getElementsByTagName("idDest")->item(0)->nodeValue ?? null;
+        
+        $CRT = null;
+        if (!empty($this->emit->getElementsByTagName("CRT")->item(0))) {
+             $CRT = (int) $this->emit->getElementsByTagName("CRT")->item(0)->nodeValue;
+        }
+        
+        $idDest = null;
+        if (!empty($this->ide->getElementsByTagName("idDest")->item(0))) {
+            $idDest = (int) $this->ide->getElementsByTagName("idDest")->item(0)->nodeValue;
+        }
+        
         $allowEmptyNcm = $CRT == 4 && $idDest == 1;
 
         if ($allowEmptyNcm && empty($std->NCM)) {
@@ -4770,7 +4779,11 @@ public function tagICMSSN(stdClass $std): DOMElement
         $this->stdTot->vFCPST += (float) !empty($std->vFCPST) ? $std->vFCPST : 0;
         $this->stdTot->vFCPSTRet += (float) !empty($std->vFCPSTRet) ? $std->vFCPSTRet : 0;
 
-        $CRT = $this->emit->getElementsByTagName("CRT")->item(0)->nodeValue ?? null;
+        $CRT = null;
+        if (!empty($this->emit->getElementsByTagName("CRT")->item(0))) {
+            $CRT = (int) $this->emit->getElementsByTagName("CRT")->item(0)->nodeValue;
+        }
+        
         $allowEmptyOrig = $CRT == 4 && in_array($std->CSOSN, [
             '102', '103', '300', '400', '900',
         ]);